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Diodes Incorporated PI5A4157CEX
- Part No.:
- PI5A4157CEX
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
PI5A4157CEX.pdf
- Description:
- IC SWITCH SPDTX1 1.2OHM SOT363-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,119
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Product details
Overview
PI5A4157CEX from Diodes Incorporated is a low-voltage, single-pole double-throw (SPDT) CMOS analog switch with 0.8Ω typical on-resistance at 3.0V, rail-to-rail signal range, 150 MHz bandwidth, and break-before-make switching. It operates from 1.65V to 5.5V and supports mobile handset baseband I/O interfacing without level-shifting.
For engineers reviewing the PI5A4157CEX datasheet, PI5A4157CEX pinout, PI5A4157CEX application, or PI5A4157CEX equivalent, key selection criteria include on-resistance flatness (<0.4Ω over 0–4.5V), control input overvoltage tolerance (5.5V min), fast transition time (12ns at 5V), and ultra-low quiescent current (≤0.1 µA).
Technical Context
The PI5A4157CEX implements a CMOS transmission gate architecture with independent voltage-tolerant control logic, enabling direct interface with sub-3.3V baseband processor GPIOs while powered from higher VCC rails. Its break-before-make timing (6–20 ns) prevents signal shorting during channel switching.
It delivers high-fidelity analog switching via low charge injection (35 pC at 5V), low THD (0.015% at 20Hz–20kHz), and high off-isolation (–70 dB), making it suitable for audio routing and precision sensor multiplexing in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (Typ) | 0.8Ω at 3.0V - enables minimal signal attenuation in audio and sensor paths |
| Bandwidth | 150 MHz - supports high-speed video and USB 1.1 signal routing |
| tON / tOFF | 9–18 ns / 10–20 ns - ensures rapid channel switching for dynamic signal reconfiguration |
| VCC Range | 1.65V to 5.5V - allows operation across Li-ion, 3.3V, and 5V system rails |
| Charge Injection | 35 pC at 5V - limits voltage glitch on high-impedance nodes like ADC inputs |
| OIRR | –70 dB - provides strong channel-to-channel isolation in multi-source routing |
| Operating Temp | –40°C to +85°C - qualified for extended industrial and portable consumer environments |
Pinout & Package
PI5A4157CEX is packaged in a Pb-free, RoHS-compliant 6-pin SC70 (SOT363) package measuring 2.0 mm × 1.25 mm × 0.9 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (B1) | Switch Input Port 1 | Secondary analog input path; connects to A when S = 1 |
| 2 (GND) | Ground Reference | Return path for analog signals and supply current; must be low-impedance |
| 3 (B0) | Switch Input Port 0 | Primary analog input path; connects to A when S = 0 |
| 4 (A) | Common Output/Data Port | Shared analog output node; routed to B0 or B1 based on S state |
| 5 (VCC) | Positive Supply Rail | Power source for internal logic and switch bias; sets RON and bandwidth |
| 6 (S) | Digital Control Input | Logic-select line tolerant up to 5.5V regardless of VCC; no level shifter needed |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports full VCC-range signal swing without clipping or distortion |
| Break-before-make timing | Guaranteed 6–20 ns dead time prevents momentary short between B0/B1 |
| Ultra-low quiescent current | ≤0.1 µA at VCC = 5.5V - extends battery life in always-on mobile subsystems |
| Control input overvoltage tolerance | 5.5V absolute max on S pin - eliminates need for external clamping diodes |
| Low on-resistance flatness | ≤0.4Ω variation across 0–4.5V input range - preserves signal linearity |
Applications
| Mobile Audio Routing | USB 1.1 Signal Switching |
|---|---|
|
Use Scenario: Selecting between headset and speaker outputs in smartphone baseband subsystems. IC Role / Device Role / Timing Role: SPDT analog switch routing stereo audio signals with <0.015% THD and <35 pC charge injection. Use Value: Eliminates audible pop/click during output switching and maintains SNR >95 dB. |
Use Scenario: Dynamically selecting between two USB upstream ports in portable docking stations. IC Role / Device Role / Timing Role: High-bandwidth (150 MHz) analog switch handling D+/D− differential pairs at 12 Mbps. Use Value: Preserves signal integrity with –70 dB crosstalk and <12 ns propagation delay skew. |
| Portable Instrumentation Multiplexing | Low-Power Sensor Interface |
|
Use Scenario: Multiplexing multiple analog sensor outputs (e.g., temperature, pressure, humidity) into a shared ADC channel. IC Role / Device Role / Timing Role: Precision analog switch with matched on-resistance (∆RON ≤0.04 Ω) and low leakage (<20 nA). Use Value: Enables <0.1% gain error across channels and <1 LSB measurement drift over temperature. |
Use Scenario: Enabling/disabling analog front-end paths in wearable health monitors to conserve battery. IC Role / Device Role / Timing Role: Low-leakage (±40 nA), ultra-low ICC (≤0.1 µA) switch controlled directly by MCU GPIO. Use Value: Reduces standby power by >95% compared to discrete FET solutions while maintaining signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSM1014ICT | Higher RON (1.5Ω typ at 3V), lower bandwidth (80 MHz), no break-before-make guarantee | Suitable for non-critical digital bus switching but not precision audio or sensor paths | Prefer where cost sensitivity outweighs signal integrity requirements |
| MAX4677EUT+T | Lower charge injection (15 pC), wider temp range (–40°C to +125°C), but larger SOT23-6 footprint | Better suited for automotive-grade instrumentation requiring extended thermal margin | Choose when operating above 85°C ambient or needing tighter glitch control |
Compared with TSM1014ICT and MAX4677EUT+T, the PI5A4157CEX offers optimal balance of ultra-low RON, guaranteed break-before-make, and sub-1µA quiescent current-making it ideal for space-constrained, battery-sensitive mobile designs where analog fidelity and GPIO compatibility are critical.
Availability
PI5A4157CEX is available at Aetrix Electronics and suitable for mobile handset audio routing, portable instrumentation multiplexing, and low-power sensor interface applications requiring stable component supply and long-term lifecycle support.
Supply support for PI5A4157CEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance, energy-efficient components for consumer, computing, and industrial markets.
The PI5A4157CEX belongs to Diodes' high-speed analog switch product line, designed specifically for low-voltage, low-power portable electronics requiring rail-to-rail signal integrity and direct microcontroller GPIO compatibility.
FAQ
Is PI5A4157CEX compatible with 1.8V logic control signals when VCC = 3.3V?
Yes. The S input is overvoltage-tolerant up to 5.5V and functions correctly with logic-high thresholds as low as 0.9V at VCC = 1.65V. At VCC = 3.3V, VIH is specified at 1.1V min, so standard 1.8V GPIO outputs fully satisfy the high-level requirement without level shifting.
What is the maximum continuous current per channel?
The PI5A4157CEX supports up to 128mA DC current per channel, verified under maximum ratings. However, sustained operation above 100mA increases junction temperature and degrades RON flatness; design guidance recommends limiting steady-state current to ≤100mA for optimal performance and thermal stability.
Does PI5A4157CEX require external pull-up or pull-down resistors on the S pin?
No. The S input has defined VIH and VIL thresholds across all VCC conditions and must be driven actively HIGH or LOW. Floating the S pin is prohibited per datasheet note; external biasing is unnecessary if the driving GPIO has push-pull output capability.
Can PI5A4157CEX be used in bidirectional analog signal paths?
Yes. As a CMOS transmission gate, it supports true bidirectional analog signal flow between A and either B0 or B1. Signal direction is determined by external circuitry-not device architecture-and performance parameters (RON, capacitance, bandwidth) apply equally in both directions.
PI5A4157CEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 1.2Ohm
- Channel-to-Channel Matching (ΔRon):
- 10mOhm
- Voltage - Supply, Single (V+):
- 1.65V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 18ns, 20ns
- -3db Bandwidth:
- 150MHz
- Charge Injection:
- 35pC
- Channel Capacitance (CS(off), CD(off)):
- 3.5pF
- Current - Leakage (IS(off)) (Max):
- 20nA
- Crosstalk:
- -70dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363-6 (SC-70)
PI5A4157CEX FAQ
1.How can I place an order for PI5A4157CEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI5A4157CEX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PI5A4157CEX reliable?
The price and inventory of PI5A4157CEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI5A4157CEX is usually 5 days.
3.What payment methods are accepted for PI5A4157CEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI5A4157CEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI5A4157CEX?
PI5A4157CEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI5A4157CEX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PI5A4157CEX?
For technical support, including PI5A4157CEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI5A4157CEX requirements.
6.How does Aetrix verify that PI5A4157CEX is sourced from the original manufacturer or authorized distributors?
All PI5A4157CEX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI5A4157CEX meets industry standards.
7.What is the process for return or replacement of PI5A4157CEX?
All PI5A4157CEX units undergo pre-shipment inspection (PSI). If there is an issue with PI5A4157CEX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PI5A4157CEX part is unused and in its original packaging.
Return procedure for PI5A4157CEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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